Bulletin of the Museum of Comparative Zoology 

 AT HARVARD COLLEGE. 



Vol. XXII. No. 2. 



THE GASTRULATION OF AURELIA FLAVIDULA, Pee. & Les. 



Br Fkank Smith. 



With Two Plates. 



CAMBRIDGE, U.S.A.: 



PRINTED FOR THE MUSEUM. 



December, 1891. 



